文献类型：期刊文献

英文题名：Development of low viscosity itaconic acid-based epoxy resins for cationic-radical hybrid UV-curable coatings with superior properties

作者：Zhuo, Guangwu[1,2] Huang, Yishuai[1,2] Zhang, Yinliang[1,2] Huang, Jingshu[2] Xu, Jinmei[3] Guo, Chuigen[1,2]

第一作者：Zhuo, Guangwu

通信作者：Guo, CG[1];Xu, JM[2]

机构：[1]South China Agr Univ, Inst Biomass Engn, Guangzhou 510642, Peoples R China;[2]South China Agr Univ, Coll Mat & Energy, Key Lab Biobased Mat & Energy, Minist Educ, Guangzhou 510642, Peoples R China;[3]Res Inst Wood Ind, Chinese Acad Forestry, Beijing 100091, Peoples R China

年份：2025

卷号：214

外文期刊名：REACTIVE & FUNCTIONAL POLYMERS

收录：;EI(收录号：20252018424871);Scopus(收录号：2-s2.0-105004904322);WOS:【SCI-EXPANDED(收录号:WOS:001499955600001)】；

基金：The research was financially supported by the National Natural Science Foundation of China (32371791 and 32071694) ; Key Research special Projects in Universities in Guangdong Province (2019KZDZX2002) ; Guangzhou Municipal Science and Technology Project (201905010005) .

语种：英文

外文关键词：Itaconic acid; UV-curable epoxy coatings; Low viscosity; Cationic polymerization; Radical polymerization

摘要：Bio-based UV-curable coatings have gained increasing attention for their eco-friendly and renewable nature, but conventional systems are often limited by high viscosity and a single crosslinking mechanism. In this study, an itaconic acid-based epoxy resin (EIA) with low viscosity (235.8 mPa center dot s) and dual reactivity, including both epoxy and C--C bonds, was synthesized via esterification. This resin was employed to construct a cationic-radical hybrid UV-curable coating system, and three different comonomers were incorporated to fine-tune the curing behavior and final performance of the coatings. The results showed that the films with glycidyl methacrylate as the comonomer achieved 98.01 % epoxy conversion, 78.70 % C--C bond conversion, and a crosslinking density of 979.89 mol center dot m-3. Meanwhile, the films exhibited outstanding mechanical thermal, and physical properties, including a tensile strength of 26.5 MPa, a glass transition temperature (Tg) of 54.5 degrees C, minimal shrinkage (2.3 %), and high gloss (92.3 degrees). Additionally, all UV-cured coatings showed excellent pencil hardness, adhesion, and hydrophobicity. These hybrid systems offer a novel and efficient strategy for developing high-performance UVcurable coatings that combine enhanced environmental sustainability with outstanding properties.